Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-19-0067.1 |
Characterizing the Energetics of Vortex-Scale and Sub-Vortex-Scale Asymmetries during Tropical Cyclone Rapid Intensity Changes | |
Bhalachandran, Saiprasanth1,6; Chavas, Daniel R.1; Marks, Frank D., Jr.2; Dubey, S.3; Shreevastava, A.4; Krishnamurti, T. N.5 | |
2020 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2020 |
卷号 | 77期号:1页码:315-336 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; India |
英文摘要 | Our collective understanding of azimuthally asymmetric features within the coherent structure of a tropical cyclone (TC) continues to improve with the availability of more detailed observations and high-resolution model outputs. However, a precise understanding of how these asymmetries impact TC intensity changes is lacking. Prior attempts at investigating the asymmetric impacts follow a mean-eddy partitioning that condenses the effect of all the asymmetries into one term and fails to highlight the differences in the role of asymmetries at different scales. In this study, we present a novel energetics-based approach to analyze the asymmetric impacts at multiple length scales during periods of rapid intensity changes. Using model outputs of TCs under low and high shear, we compute the different energy pathways that enhance/suppress the growth of multiscale asymmetries in the wavenumber (WN) domain. We then compare and contrast the energetics of the mean-flow field (WN 0) with that of the persistent, coherent vortex-scale asymmetric structures (WNs 1 and 2) and the more local, transient, sub-vortex-scale asymmetries (WNs >= 3). We find in our case studies that the dominant mechanisms of growth/decay of the asymmetries are the baroclinic conversion from available potential to kinetic energy at individual scales of asymmetries and the transactions of kinetic energy between the asymmetries of various length scales, rather than the barotropic mean-eddy transactions as is typically assumed. Our case study analysis further shows that the growth/decay of asymmetries is largely independent of the mean. Certain aspects of eddy energetics can potentially serve as early-warning indicators of TC rapid intensity changes. |
英文关键词 | Convective-scale processes Hurricanes Eddies Tropical cyclones Vortices Numerical weather prediction forecasting |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000504095000002 |
WOS关键词 | VERTICAL WIND SHEAR ; AVAILABLE POTENTIAL-ENERGY ; HURRICANE-LIKE VORTICES ; PART I ; SIMULATED HURRICANE ; NORTH-ATLANTIC ; GRAVITY-WAVES ; SPIRAL BANDS ; ROSSBY-WAVES ; INNER-CORE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280262 |
专题 | 地球科学 |
作者单位 | 1.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA; 2.NOAA, Hurricane Res Div, AOML, Miami, FL USA; 3.Indian Inst Technol, New Delhi, India; 4.Purdue Univ, Dept Civil Engn, W Lafayette, IN 47907 USA; 5.Florida State Univ, Tallahassee, FL 32306 USA; 6.Stanford Univ, Dept Earth Syst Sci, Stanford, CA 94305 USA |
推荐引用方式 GB/T 7714 | Bhalachandran, Saiprasanth,Chavas, Daniel R.,Marks, Frank D., Jr.,et al. Characterizing the Energetics of Vortex-Scale and Sub-Vortex-Scale Asymmetries during Tropical Cyclone Rapid Intensity Changes[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2020,77(1):315-336. |
APA | Bhalachandran, Saiprasanth,Chavas, Daniel R.,Marks, Frank D., Jr.,Dubey, S.,Shreevastava, A.,&Krishnamurti, T. N..(2020).Characterizing the Energetics of Vortex-Scale and Sub-Vortex-Scale Asymmetries during Tropical Cyclone Rapid Intensity Changes.JOURNAL OF THE ATMOSPHERIC SCIENCES,77(1),315-336. |
MLA | Bhalachandran, Saiprasanth,et al."Characterizing the Energetics of Vortex-Scale and Sub-Vortex-Scale Asymmetries during Tropical Cyclone Rapid Intensity Changes".JOURNAL OF THE ATMOSPHERIC SCIENCES 77.1(2020):315-336. |
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